My name is Rafael Guerrero(24) Iv lived in Mission all my life, I dont know if it will help but my fathers name was Rogelio Guerrero(died in 1980) born to Jesus and Rita Guerrero.I do belive they were from a small town near Diaz Ordaz Mx. I dont know many people from my dads side of the family but I will ask about the names your granparents.